'Universal' Relation Fails to Replace Relational Model (letter to the editor).
E. F. CoddPublished in: IEEE Softw. (1988)
Keyphrases
- universal relation
- relational model
- functional dependencies
- relational algebra
- relational databases
- inclusion dependencies
- data model
- relational database systems
- integrity constraints
- database technology
- database design
- normal form
- incomplete information
- complex objects
- relational data model
- relational calculus
- database schema
- relational models
- data dependencies
- database
- nested relations
- conjunctive queries
- spatial databases
- conceptual model
- user defined
- knowledge representation
- data analysis
- case study